3 question Blog

So far, I have completed every task that has been given to me. Such as the conclusions and calculations for the labs in Chemistry. Its been tough but I'm doing my best to finish everything when it's due. I have learned many things such as how useful significant digits are, and also the different properties of matter and much more. The notes help me to get a better understanding of everything which makes it easier to follow. Now, I'm preparing myself for the chemical and physical properties lab by listing the chemicals and other materials that will be used. Also reading and writing the safety precautions for this lab which is extremely important.

Interactions of Powder/ Identifying White Powders

Today we combined liquids and white powders! The liquids we used were Vinegar, DI H2O, and Iodine. The Powders we used consisted of Baking Soda, Corn Starch, and Baking Powder. We combined Corn starch with Iodine, then with Baking Powder, and also with Baking soda. We combined Vinegar and DI H2O also with all the powders. In which all were seperated. My partner and I were able to distinguish the Powders by looking at them and seeing how they reacted. For example, Iodine and Corn Starch changed colors and so did Iodine and Baking powder and also, Iodine and Baking Soda. Vinegar and Baking Powder bubbled, as did Vinegar and Baking Soda, and DI H2O also bubbled when it was mixed with Baking Soda and also, Baking Powder. DI H2O and Cornstarch Dissolved as well as Vinegar and Cornstarch. We were given results that would allow us to identify a unknown powder, in which we did! We noticed that the powder bubbled with DI H2O and Vinegar and also changed colors when we added iodine, so the powder must've been Baking Soda! It was a fun and interesting lab!!

Accuracy and Precision in the Food Industry

Today we determined if we actually received what we pay for with food, using chips. The answer is no! The bags of chips were not accurate. We calculated the acceptable range to determine the accuracy. Using the bags net weight that was provided, we added 0.10 grams to the initial bag net weight to find the highest range and subtracted 0.10 to find the lowest range. We then took the chips out, and ate them... thats why the bag is empty in the picture below. Yum! We ended up weighing the empty bag  which is known as the tare weight. The weight of the bag moved two decimal places because it no longer included the chips. Regardless if you moved the decimal more places it wouldn't have impacted the precision or accuracy because it would have been outside out the range. Precision and accuracy are similar but somewhat different. Precision is the closeness of two or more measurements. Accuracy is the true value.

Bouncy Ball Explore Blog

Hello everyone! We made our own bouncy balls out of glue and borox. We learned that the less amount of glue used, the higher the ball will bounce. Of course my partner and I learned that from experience. As you can see in the picture below, we used way to much glue! In this experiment, the glue was the independent variable and the borox was the dependent variable since the glue was being hardened by the borox. It would be slightly difficult for someone to duplicate the exact size and weight of the bouncy ball I created because I forgot to write how much of each material I used! Oops! Anyways, trial and error is science because without it, it would be difficult to prove if something is true or false without testing your theory.